EXECUTIVE SUMMARYThis study addresses the question, How does CEO power affect, and respond to, corporate performance transitions over time? Drawing on insights culled from the top management and organizational life-cycle literature, we assumed that CEO power rises and falls in tandem with a firm's upward or downward performance cycles. However, our examination of four CEO "power characteristics"-structural, ownership, expert, and prestige-at 38 major U.S. corporations over a period of 12 years showed, instead, that CEOs' power (1) rises and falls within both upward and downward performance transitions and (2) does not rise and fall in a steady, monotonic fashion. In fact, some dimensions of CEO power are clearly more tied than others to changes in firm performance, and shifts in CEO power can also be linked to either the early or the late part of each transition cycle. These results have several implications for competitive intelligence (CI) professionals: First, the four power characteristics seem to behave independently of each other and seem to influence performance in their own unique ways. Each characteristic seems to play a very special role in the scheme of things and contribute uniquely to our understanding of performance transitions. Because of the special role that each power characteristic assumes in driving a firm's performance, CI professionals must track all four power indicators (and not simply any one of the indicators) to fully comprehend the performance changes.